What would a class be without a dunce? A bit like a curry without spice. And Ducoboo sure spices up his fellow pupils' days. Not one lesson goes by without flavour—with him, school is an endless string of break-times. Of course, there’s always Leonie, the terribly gifted girl who doesn't put up with Ducoboo's messing and doesn't believe in sharing knowledge. Of course, there’s also the teacher, whose index finger turns out to be more threatening than ever… No, school life isn’t one long, smooth ride: For some, the school year is perhaps the most dangerous time of all!

A new year approaches for pitifully inept student Ducoboo, dunce extraordinaire and notorious troublemaker. A whole year of enduring Mr Latouche’s punishments, of sharing the dunce cap with Skelly, the biology class skeleton, and of course of waging merciless war on his deskmate, top student Leonie, who refuses to let him copy her answers. But behind the dim-witted clown’s facade, could Ducoboo be hiding a loyal heart?

M. Latouche, l'instituteur, n'en croit pas ses yeux : Ducobu, le roi des cancres, le fortiche de la triche, le «z'héros» absolu de la classe, est manifestement ravi de rentrer à l'école ! A quoi attribuer cet enthousiasme miraculeux ? Pendant les vacances, notre amour de potache a suivi une méthode d'apprentissage révolutionnaire sur internet. En se branchant chaque soir sur «www.cr@ck», il a ainsi pu emmagasiner une quantité ahurissante de connaissances pendant son sommeil ! De toute évidence, ses résultats aux interros le prouvent, la méthode est d'une efficacité époustouflante. Elle n'en a pas moins ses failles... surtout quand, tiens-tiens, Léonie est absente !